If you're a Tier 1 supplier to the Big 3 you ought to already have all the documentation you need. This issue was addressed by the back in '99 when they told all their Tier 1's to do this. There is a pretty good trail of the discussions we had here in the Forum archives I think. Just search back to 1999 and follow what we said then.
I can tell you this though. If your top guys want to quit 14K to save money or make it easy tell them to forget getting money from those other guys. Ford has stated in no uncertain terms. No 14K-No moola. The others are about the same. Oh yeah to varying degrees so are the Japanese, Koreans, Germans and most of the rest of the civilized industrial world of automakers. Either get in the boat or learn to tread water. There are probably other companies waiting in the wings to fill your spot.
What never ceases to amaze me is how when people get to the TOP they automatically become smarter or sharper businessmen through osmosis, or the water, or through the crak they share in the boys room.
Tell them peeing and moaning about 14K with the Big 3 is a dead horse that doesn't need to be beaten anymore.